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Home > Products > Discrete Semiconductor Products > Transistors > Bipolar (BJT) > Single Bipolar Transistors

STMicroelectronics STT13005D-K

Name: STT13005D-K
Brand: STMicroelectronics
SKU: STT13005D-K
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: STT13005D-K

Manufacturer:: STMicroelectronics

Category:: Single Bipolar Transistors

Package:: TO-225AA, TO-126-3

Datasheet:: STT13005D-K.pdf

Description:: TRANS NPN 400V 2A SOT-32-3

Quantity:: RFQ Add To RFQ list

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Inventory:7,870

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Product details

Overview

STT13005D-K from STMicroelectronics is a high-voltage fast-switching NPN power transistor with integrated antiparallel collector-emitter diode, 700 V V_CES, 2 A I_C, and 45 W P_TOT at T_C = 25 °C, designed for electronic ballasts and low-power flyback/forward SMPS.

For engineers reviewing the STT13005D-K datasheet, STT13005D-K pinout, STT13005D-K application, or STT13005D-K equivalent, key selection criteria include V_CEO = 400 V, t_r/t_f ≤ 0.7 µs (resistive), R_thJC = 2.8 °C/W, and integrated diode functionality in SOT-32 package.

Technical Context

This device uses high-voltage multi-epitaxial planar technology with cellular emitter structure and planar edge termination to achieve high switching speed while preserving wide RBSOA. It supports both resistive (t_r = 0.4 µs, t_f = 0.25 µs) and inductive (t_s = 0.8 µs, t_f = 0.16 µs) load switching.

The integrated antiparallel diode enables self-commutated operation in flyback topologies without external diode, and its 150 °C max junction temperature supports continuous operation in thermally constrained lighting and SMPS environments.

Key Specifications

Parameter	Value and Actual Design Meaning
V_CES	700 V - Withstands full mains-related transients in 230 VAC ballast and SMPS primary-side applications.
I_C	2 A continuous - Supports up to ~25 W output in single-transistor forward/flyback converters.
t_r/t_f (resistive)	0.4 / 0.25 µs - Enables >100 kHz switching with low turn-on/turn-off losses in lighting drivers.
R_thJC	2.8 °C/W - Allows 45 W dissipation with ≤126 °C case-to-junction rise at 25 °C ambient (heatsink dependent).
V_CE(sat)	1.5 V @ I_C = 1.6 A, I_B = 0.4 A - Limits conduction loss to <2.4 W at rated current, critical for thermal management.
h_FE	8–50 @ I_C = 0.5–2 A - Provides stable base drive margin across operating range without overdesign.
V_F (integrated diode)	2.5 V @ I_F = 1 A - Reduces component count and PCB area vs. discrete diode in clamp or freewheel paths.

Pinout & Package

SOT-32 (TO-225AA) three-pin through-hole package with standard pin assignment: Pin 1 = Base, Pin 2 = Collector, Pin 3 = Emitter. The integrated antiparallel diode connects internally between Collector and Emitter.

Pin/Terminal	Circuit Role	Design Meaning
Pin 1	Base	Current-controlled input node; requires ≥125 mA DC drive for full saturation at 0.5 A I_C.
Pin 2	Collector	High-voltage switched node; connected to primary winding in flyback, anode of integrated diode.
Pin 3	Emitter	Power return path; cathode of integrated diode; tied to ground or source in common-emitter configuration.

Key Features

Feature	Design Value
Integrated antiparallel diode	Eliminates need for external clamp/freewheel diode in flyback snubber or forward transformer reset paths.
High V_CES (700 V)	Supports direct connection to 230 VAC rectified bus with margin for line surges and ringing.
Fast switching (t_r ≤ 0.4 µs)	Reduces switching losses by >30% vs. standard bipolar transistors at 60–100 kHz, improving efficiency.
Wide RBSOA	Enables reliable operation under inductive switching stress without secondary breakdown limitations.
ECOPACK® compliant	Meets RoHS and halogen-free requirements for commercial lighting and industrial power supplies.

Applications

Electronic Ballast Control

Flyback SMPS Primary Switch

Use Scenario: High-frequency AC lamp driving in compact fluorescent lamps (CFLs) with dimming and end-of-life protection.

IC Role / Device Role / Timing Role: Main high-voltage switching element in half-bridge resonant inverter stage.

Use Value: Integrated diode enables self-resonant startup and simplifies gate drive timing by eliminating external diode recovery delay.

Use Scenario: Isolated 5–24 W offline AC/DC adapter for consumer electronics.

IC Role / Device Role / Timing Role: Single-transistor primary-side switch in discontinuous conduction mode (DCM) flyback topology.

Use Value: 700 V rating allows direct use after bridge rectifier without voltage divider, reducing BOM cost and footprint.

Forward Converter Primary Switch

Low-Cost LED Driver

Use Scenario: 15–40 W industrial control power supply with tight regulation and transient immunity.

IC Role / Device Role / Timing Role: Main switching transistor in single-ended forward converter with active clamp or RCD reset.

Use Value: Wide RBSOA ensures robustness during transformer reset phase and prevents secondary breakdown under load step changes.

Use Scenario: Non-isolated buck-derived LED driver for streetlight or panel lighting with universal AC input.

IC Role / Device Role / Timing Role: High-side switch controlling current through LED string via PWM or analog dimming.

Use Value: Fast t_f (0.16 µs inductive) minimizes tail current during dimming transitions, improving flicker performance.

Equivalent & Alternatives

The following parts are listed as comparable options for similar high-voltage NPN switching transistor applications.

Alternative Part	Technical Difference	Application Difference	Selection Advice
STT13003D	V_CES = 450 V, I_C = 1.5 A, slower t_r/t_f (0.6/0.35 µs)	Limited to 115 VAC or low-surge 230 VAC designs; lower power handling.	Select when cost sensitivity outweighs surge margin and output power requirements.
BU508A	V_CEO = 1500 V, no integrated diode, higher V_CE(sat) (2 V), TO-220 package	Requires external diode and heatsink; suited for high-voltage linear or quasi-resonant designs.	Choose only if absolute V_CEO > 1 kV is mandatory and board space permits larger package.

Compared with STT13003D, STT13005D-K delivers +55% voltage headroom and +33% current capacity for 230 VAC ballasts; versus BU508A, it reduces component count and improves thermal efficiency but trades off ultimate voltage rating for integration and compactness.

Availability

STT13005D-K is available at Aetrix Electronics and suitable for electronic ballasts, flyback SMPS, forward converters, and non-isolated LED drivers requiring stable component supply and long-term manufacturability.

Supply support for STT13005D-K includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.

Manufacturer

STMicroelectronics is a global semiconductor leader headquartered in Geneva, designing and manufacturing analog, digital, and mixed-signal ICs and discrete power devices for industrial, automotive, and consumer markets.

The STT1300x-D series targets cost-sensitive, high-reliability lighting and low-power SMPS applications where integrated diode functionality, fast switching, and 700 V capability deliver system-level simplification.

FAQ

What is the maximum recommended case temperature for continuous operation?

The device specifies P_TOT = 45 W at T_C = 25 °C and R_thJC = 2.8 °C/W. To maintain T_J ≤ 150 °C, T_C must not exceed 113 °C under full load. Derating is required above 25 °C per Figure 3; at T_C = 80 °C, max power drops to ~25 W.

Can STT13005D-K replace STT13005D in existing designs?

Yes - STT13005D-K is a bag-packaged variant of STT13005D with identical electrical, thermal, and mechanical specifications. The "-K" suffix denotes packaging difference only (bag vs. tube); no design requalification is needed for form-fit-function replacement.

Is the integrated diode rated for continuous conduction?

The integrated diode has V_F = 2.5 V at I_F = 1 A and shares the same 150 °C T_J limit. It is rated for repetitive peak forward current up to I_CM = 4 A (t_P < 5 ms), but continuous forward current should be limited to ≤1 A with appropriate heatsinking to avoid thermal runaway.

Does this transistor require a base resistor for safe operation?

Yes - a base resistor is mandatory to limit I_B within 1 A absolute maximum. For I_C = 2 A and h_FE = 8 (min), minimum I_B = 250 mA is required; typical design uses 125–250 mA drive with 10–22 Ω resistor at 5 V logic level, ensuring saturation without overdrive.

STT13005D-K Specifications

Product attributes: Attribute value

Manufacturer:: STMicroelectronics

Series:: -

Package/Case:: TO-225AA, TO-126-3

Packaging:: Bulk

Product Status:: Obsolete

Transistor Type:: NPN

Current - Collector (Ic) (Max):: 2 A

Voltage - Collector Emitter Breakdown (Max):: 400 V

Vce Saturation (Max) @ Ib, Ic:: 1.5V @ 400mA, 1.6A

Current - Collector Cutoff (Max):: 250µA

DC Current Gain (hFE) (Min) @ Ic, Vce:: 10 @ 500mA, 5V

Power - Max:: 45 W

Frequency - Transition:: -

Operating Temperature:: 150°C (TJ)

Grade:: -

Qualification:: -

Mounting Type:: Through Hole

Supplier Device Package:: SOT-32-3

STT13005D-K FAQ

1.How can I place an order for STT13005D-K through Aetrix?

Please submit a Request for Quotation (RFQ) for STT13005D-K on Aetrix. Our sales agent will provide a competitive quotation and guide you through the order confirmation once you accept the terms.

2.Are the price and stock information for STT13005D-K reliable?

The price and inventory of STT13005D-K are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for STT13005D-K is usually 5 days.

3.What payment methods are accepted for STT13005D-K?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for STT13005D-K transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for STT13005D-K?

STT13005D-K orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your STT13005D-K order is processed, you will receive an email with the shipment details and tracking number.

Note: Tracking information may take up to 24 hours to appear. Express delivery typically takes 3–5 business days.

5.How can I obtain technical support or documentation for STT13005D-K?

For technical support, including STT13005D-K datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your STT13005D-K requirements.

6.How does Aetrix verify that STT13005D-K is sourced from the original manufacturer or authorized distributors?

All STT13005D-K products on Aetrix are procured from qualified distributors and authorized channels. Our dedicated quality assurance team conducts strict verification, including traceability checks and, if necessary, third-party testing. This ensures that STT13005D-K meets industry standards.

7.What is the process for return or replacement of STT13005D-K?

All STT13005D-K units undergo pre-shipment inspection (PSI). If there is an issue with STT13005D-K, returns or replacements are accepted under the following conditions:

1.Quantity discrepancies, incorrect items, or visible external defects (such as breakage or corrosion), acknowledged by Aetrix.

2.The issue is reported within 90 days of delivery.

3.The STT13005D-K part is unused and in its original packaging.

Return procedure for STT13005D-K:

1.Submit a request within 90 days.

2.Obtain a Return Material Authorization (RMA) from Aetrix.

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